脱式计算 495÷15×26 26×(28+17) (780-724)×15 (145+55)÷20 256-18-82 210+720÷30.
(1)495÷15×26,
=33×26,
=858;
(2)26×(28+17),
=26×45,
=1170;
(3)(780-724)×15,
=56×15,
=840;
(4)(145+55)÷20,
=200÷20,
=10;
(5)256-18-82,
=256-(18+82),
=256-100,
=156;
(6)210+720÷30,
=210+24,
=234.
=33×26,
=858;
(2)26×(28+17),
=26×45,
=1170;
(3)(780-724)×15,
=56×15,
=840;
(4)(145+55)÷20,
=200÷20,
=10;
(5)256-18-82,
=256-(18+82),
=256-100,
=156;
(6)210+720÷30,
=210+24,
=234.
温馨提示:答案为网友推荐,仅供参考